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26<div class="titlepage"><div><div><h3 class="title">
27<a name="boost_typetraits.reference.add_rvalue_reference"></a><a class="link" href="add_rvalue_reference.html" title="add_rvalue_reference">add_rvalue_reference</a>
28</h3></div></div></div>
29<pre class="programlisting"><span class="keyword">template</span> <span class="special">&lt;</span><span class="keyword">class</span> <span class="identifier">T</span><span class="special">&gt;</span>
30<span class="keyword">struct</span> <span class="identifier">add_rvalue_reference</span>
31<span class="special">{</span>
32 <span class="keyword">typedef</span> <em class="replaceable"><code>see-below</code></em> <span class="identifier">type</span><span class="special">;</span>
33<span class="special">};</span>
34</pre>
35<p>
36 <span class="bold"><strong>type:</strong></span> If <code class="computeroutput"><span class="identifier">T</span></code>
37 names an object or function type then the member typedef type shall name
38 <code class="computeroutput"><span class="identifier">T</span><span class="special">&amp;&amp;</span></code>;
39 otherwise, type shall name <code class="computeroutput"><span class="identifier">T</span></code>.
40 <span class="emphasis"><em>[Note: This rule reflects the semantics of reference collapsing.
41 For example, when a type <code class="computeroutput"><span class="identifier">T</span></code>
42 names a type U&amp;, the type <code class="computeroutput"><span class="identifier">add_rvalue_reference</span><span class="special">&lt;</span><span class="identifier">T</span><span class="special">&gt;::</span><span class="identifier">type</span></code> is not an rvalue reference. -end note]</em></span>.
43 </p>
44<p>
45 <span class="bold"><strong>C++ Standard Reference:</strong></span> 20.7.6.2.
46 </p>
47<p>
48 <span class="bold"><strong>Header:</strong></span> <code class="computeroutput"> <span class="preprocessor">#include</span>
49 <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">type_traits</span><span class="special">/</span><span class="identifier">add_rvalue_reference</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>
50 or <code class="computeroutput"> <span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">type_traits</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">&gt;</span></code>
51 </p>
52<div class="table">
53<a name="boost_typetraits.reference.add_rvalue_reference.examples"></a><p class="title"><b>Table&#160;1.15.&#160;Examples</b></p>
54<div class="table-contents"><table class="table" summary="Examples">
55<colgroup>
56<col>
57<col>
58</colgroup>
59<thead><tr>
60<th>
61 <p>
62 Expression
63 </p>
64 </th>
65<th>
66 <p>
67 Result Type
68 </p>
69 </th>
70</tr></thead>
71<tbody>
72<tr>
73<td>
74 <p>
75 <code class="computeroutput"><span class="identifier">add_rvalue_reference</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&gt;::</span><span class="identifier">type</span></code>
76 </p>
77 </td>
78<td>
79 <p>
80 <code class="computeroutput"><span class="keyword">int</span><span class="special">&amp;&amp;</span></code>
81 </p>
82 </td>
83</tr>
84<tr>
85<td>
86 <p>
87 <code class="computeroutput"><span class="identifier">add_rvalue_reference</span><span class="special">&lt;</span><span class="keyword">int</span>
88 <span class="keyword">const</span><span class="special">&amp;&gt;::</span><span class="identifier">type</span></code>
89 </p>
90 </td>
91<td>
92 <p>
93 <code class="computeroutput"><span class="keyword">int</span> <span class="keyword">const</span><span class="special">&amp;</span></code>
94 </p>
95 </td>
96</tr>
97<tr>
98<td>
99 <p>
100 <code class="computeroutput"><span class="identifier">add_rvalue_reference</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">*&gt;::</span><span class="identifier">type</span></code>
101 </p>
102 </td>
103<td>
104 <p>
105 <code class="computeroutput"><span class="keyword">int</span><span class="special">*&amp;&amp;</span></code>
106 </p>
107 </td>
108</tr>
109<tr>
110<td>
111 <p>
112 <code class="computeroutput"><span class="identifier">add_rvalue_reference</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">*&amp;&gt;::</span><span class="identifier">type</span></code>
113 </p>
114 </td>
115<td>
116 <p>
117 <code class="computeroutput"><span class="keyword">int</span><span class="special">*&amp;</span></code>
118 </p>
119 </td>
120</tr>
121<tr>
122<td>
123 <p>
124 <code class="computeroutput"><span class="identifier">add_rvalue_reference</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&amp;&amp;&gt;::</span><span class="identifier">type</span></code>
125 </p>
126 </td>
127<td>
128 <p>
129 <code class="computeroutput"><span class="keyword">int</span><span class="special">&amp;&amp;</span></code>
130 </p>
131 </td>
132</tr>
133<tr>
134<td>
135 <p>
136 <code class="computeroutput"><span class="identifier">add_rvalue_reference</span><span class="special">&lt;</span><span class="keyword">void</span><span class="special">&gt;::</span><span class="identifier">type</span></code>
137 </p>
138 </td>
139<td>
140 <p>
141 <code class="computeroutput"><span class="keyword">void</span></code>
142 </p>
143 </td>
144</tr>
145</tbody>
146</table></div>
147</div>
148<br class="table-break"><p>
149 <span class="bold"><strong>Compiler Compatibility:</strong></span> In the absence of
150 rvalue-reference support this trait has no effect.
151 </p>
152</div>
153<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
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155<td align="right"><div class="copyright-footer">Copyright &#169; 2000, 2011 Adobe Systems Inc, David Abrahams,
156 Frederic Bron, Steve Cleary, Beman Dawes, Aleksey Gurtovoy, Howard Hinnant,
157 Jesse Jones, Mat Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten
158 Ottosen, Roman Perepelitsa, Robert Ramey, Jeremy Siek, Robert Stewart and Steven
159 Watanabe<p>
160 Distributed under the Boost Software License, Version 1.0. (See accompanying
161 file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
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